312312212 has 6 divisors (see below), whose sum is σ = 546546378. Its totient is φ = 156156104.

The previous prime is 312312167. The next prime is 312312241. The reversal of 312312212 is 212213213.

It can be written as a sum of positive squares in only one way, i.e., 308494096 + 3818116 = 17564^2 + 1954^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39039023 + ... + 39039030.

It is an arithmetic number, because the mean of its divisors is an integer number (91091063).

Almost surely, 2^312312212 is an apocalyptic number.

It is an amenable number.

312312212 is a deficient number, since it is larger than the sum of its proper divisors (234234166).

312312212 is a wasteful number, since it uses less digits than its factorization.

312312212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78078057 (or 78078055 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 312312212 is about 17672.3572847541. The cubic root of 312312212 is about 678.4684475639.

Adding to 312312212 its reverse (212213213), we get a palindrome (524525425).

The spelling of 312312212 in words is "three hundred twelve million, three hundred twelve thousand, two hundred twelve".